Debt instrument additional borrowing capacity.

No definition available.

Name:	lnth_DebtInstrumentAdditionalBorrowingCapacity
Namespace Prefix:	lnth_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the net leverage ratio for the covenants. Contains a number of , negative, reporting and financial covenants, in each case subject to certain exceptions and materiality thresholds. Required to be in quarterly compliance, measured on a trailing four quarter basis. contains usual and customary restrictions on the ability of the Company and its subsidiaries to: (i) incur additional indebtedness (ii) create liens; (iii) consolidate, merge, sell or otherwise dispose of all or substantially all of its assets; (iv) sell certain assets; (v) pay dividends on, repurchase or make distributions in respect of capital stock or make other restricted payments; (vi) make certain investments; (vii) repay subordinated indebtedness prior to stated maturity; and (viii) enter into certain transactions with its affiliates.

+ References

No definition available.

+ Details

Name:	lnth_DebtInstrumentCovenantLeverageRatio
Namespace Prefix:	lnth_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
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- Details

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- Details

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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=lnth_TwoThousandAndSeventeenTermFacilityMember
Namespace Prefix:
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Financing Arrangements - Revolving Facility (Details)	12 Months Ended
Financing Arrangements - Revolving Facility (Details)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Mar. 30, 2017 USD ($)
Debt Instrument [Line Items]
Revolving line of credit	$ 0	$ 0
Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, face amount			$ 75,000,000
Revolving Credit Facility \| Leverage Ratio Range One
Debt Instrument [Line Items]
Unused line of credit fee (in percentage)	0.38%
Debt instrument covenant leverage ratio	3.00
Revolving Credit Facility \| Leverage Ratio Range Two
Debt Instrument [Line Items]
Unused line of credit fee (in percentage)	0.25%
Debt instrument covenant leverage ratio	3.00
Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	3.00%
Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	2.00%
Revolving Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Debt instrument, face amount	$ 20,000,000
2017 Term Facility
Debt Instrument [Line Items]
Increase in aggregate principal amount			75,000,000
Debt instrument, face amount			$ 275,000,000
2017 Term Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	3.75%
2017 Term Facility \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate (in percent)	2.75%